Best Investigation movies of 1970s

Actors : Barry Newman, Diana Muldaur, Robert Colbert, Harold Gould,
Directors : Sidney J. Furie,

Tony Petrocelli, a bright young lawyer practicing in the rich cattle town of Baker, becomes embroiled in a murder case.

Actors : Robert Duvall, Jennifer O'Neill, Patrick Magee, Donald Sutherland,
Directors : Tom Gries,

An insurance investigator romances a wealthy young beauty when he suspects she may be involved in fencing stolen jewels.

Actors : Gloria Hendry, Sherry Jackson, Michael Heit, Robert Viharo,
Directors : Don Edmonds,

A bounty hunter in Los Angeles sets out to track down and stop a masked serial killer who murders women by using kung-fu moves.

Actors : Fabio Testi, Uschi Glas, Jean Gabin, Jacques Richard,
Directors : Denys de La Patellière,

Whilst being transferred to a psychiatric hospital, a ruthless serial killer Gassot makes a break and goes on the run. He arrives in Marseilles, intending to escape abroad. Here, he falls for a young prostitute, Gerda.

Actors : Vinod Mehra, Sunil Dutt, Shatrughan Sinha, Sanjeev Kumar,
Directors : Rajkumar Kohli,

A newly married bride disappears after her marriage.

Actors : Linda Marlowe, Gary Hope, Sean Hewitt, Richard Monette,
Directors : Lindsay Shonteff,

A female private detective, Harriet Zapper, is hired by a rich old man to find his missing children, and becomes involved in counterfeiting and murder

Actors : Akiko Nishina, Keiko Kishi, Kôji Kita, Kôji Ishizaka,
Directors : Kon Ichikawa,

Kôsuke Kindaichi, a somewhat peculiar private detective, visits a remote town. He meets a police detective and they start to investigate an old unsolved murder. Then some murders happen. ...

Actors : Alice Arno, Norma Kastel, Jack Taylor, Lina Romay,
Directors : Jesús Franco,

A Whodunit from the great! The investigation into the suicide of a young woman found dead at the bottom of a cliff uncovers many lovers of both sexes, including her Brother's sister and her...

Actors : Nancy Kwan, Ross Hagen, Roberta Collins, Maria De Aragon,
Directors : Robert Vincent O'Neill,

An insurance investigator battles Dr. Tsu and her sexy all-girl army.

Actors : Preston Pierce, Georgina Spelvin, Susie Ewing, Rosalind Miles,
Directors : Al Adamson,

A team of girls go on a killing spree across the country.

Actors : Mary Millington, Alan Lake, Glynn Edwards, Gavin Campbell,
Directors : Willy Roe,

Two detectives are drawn into the world of porn, while investigating murders of centrefolds...

Actors : Anne Jackson, Eli Wallach, George Kennedy, Steve Ihnat,
Directors : Richard A. Colla,

A dying man frames himself for the kidnapping and murder of an industrialist so his wife and daughter can benefit from the reward money. However, his plan goes awry when he is cured!

Actors : Elsa Lanchester, Maurice Evans, Ray Milland, John Carradine,
Directors : Georg Fenady,

The murder of a Wax Museum proprietor and some other strange goings-on in the vicinity prompt a police investigator to determine whether the killer is one of the principles who wants to own...

Actors : Rosie Stone, Frank Bannon, Joshua Bryant, Linda York,

Two Los Angeles detectives are assigned to track down and arrest a brutal rapist-murderer terrorizing the city. Their job is complicated by the fact that the killer is able to avoid capture because he can pose as a woman.

Actors : Johnnie Hill, Emerson Boozer, Owen Watson, René Van Clief,
Directors : Michael Fink,

The female head of a detective agency is hired by a crime lord to figure out who's taking his action.

Actors : John Smihula, Fred Borges, Paul Smihula, Michael Siegal,
Directors : Nathan Schiff,

A series of horrible murders prompts a massive police investigation. Inspector James Cameron, a two-fisted roughneck with his own philosophy on handling crime, heads the investigation. A ...

Actors : Renato Pozzetto, Max von Sydow, Shelley Winters, Alberto Lionello,
Directors : Mauro Bolognini,

Black Journal (originally titled Gran Bollito) is a 1977 Italian drama film directed by Mauro Bolognini. It is based on the real life events of Leonarda Cianciulli, the Italian serial killer best known as the "Soap-Maker of Correggio".

Actors : Asha Parekh, Aruna Irani, Mehmood Jr., Jeetendra,
Directors : Nasir Hussain,

Sunita is a young woman who ends up married to the wrong man, Rajan. Thinking that he has conspired with his girlfriend, Monica to murder her, she runs away to find an old friend of her ...

Actors : Damiano Damiani, Riccardo Cucciolla, Franco Nero, Mario Adorf,
Directors : Florestano Vancini,

How the Italian Fascist Party managed to turn the physical elimination of a political enemy into a test of strength fundamental for the ascent into the totalitarian regime.

Actors : Yoshirô Aoki, Kai Atô, Yûsaku Matsuda, Asami Kobayashi,
Directors : Tôru Murakawa,

A journalist steals a gun from a cop after killing him and goes on a spree of robbery and murder.